Using texture from substance painter (tri plannar projection)?
It looks like your image texture is not mapped correctly on the surface, did you check, if your Texture matches your UVs? And add a Texture Coordinate and a Mapping node to your Material-Setup. The easiest way to do that is to use the Node-Wrangler-Addon (CTRL+T Shortcut), it should be activated by default in blender 2.8, select the Principled BSDF Node and import your maps by using the shortcut CTRL+T, the add-on should create the right Node-Setup. Then check if the texture-mapping is made by the UV-map. All the best Marco Vitale